Methodological Validation and Research on Root Crops Collaboration LSMS- Global Strategy Measuring Cassava Productivity in Zanzibar and Malawi GERO CARLETTO Development Research Group The World Bank Presented by NAMAN KEITA FAO Statistics Division Global Strategy Scientific Advisory Committee Meeting Rome 18-19 July 2013 Overview • On-going experiments on agriculture & livestock carried out by the LSMS team, in collaboration with partners – Aligned w/ Global Strategy to Improve Agricultural & Rural Statistics, Livestock Data Innovation in Africa (LDIA) Program – Informed by field experience, country-level interactions – Underlined by iterative, peer review Research Areas • • • • • • • Land area Crop production (continuous crops) Soil fertility Labor Skill testing Milk production Pastoralist populations Measuring production • Farmers don’t keep records • Crops like cassava harvested in small quantities over several months • Recall widely used but does not always work • Measured in non-standard units of varying size • Different units along the value chain, different states • What are the alternatives? – Need validation! Quantifying cassava Is using diaries an option? • Compare recall and diary methods for crop production estimates (and consumption from own production) in Uganda • Lack of gold standard – “well-administered” diary? – Crop cutting? • Does it vary by crop type? – Extended-harvest crops » Cassava » Banana Deininger, Carletto and Savastano (2012). “Can Diaries Help Improve Agricultural Production Statistics? Evidence from Uganda.” Journal of Development Economics Measuring Cassava Productivity in Zanzibar Objective • To test the accuracy and feasibility of various methods for the measurement of cassava productivity, in two districts in Zanzibar, Tanzania. Implementing Partners • Ministry of Agriculture and Natural Resources (MANR), Zanzibar – Experiment being conducted by MANR Block Extension Officers (BEOs) • Office of the Chief Government Statistician (OCGS), Zanzibar Measuring Cassava Productivity in Zanzibar (cont’d) • The experiment foresees the collection of cassava production data using four different methodologies, namely: (1) a diary, assisted through frequent visit by local Block Extension Officers (BEOs); (2) a diary, assisted through frequent phone calls to the farmers from a call center established as part of the project; (3) two six-month recall interviews; and (4) a 12-month recall visit. In addition, crop cutting is being carried out on one random plot per cassava farm. • Land areas for all cassava plots is being measured using several methods, including compass-and-rope, GPS and farmer’s self-reporting. Measuring Cassava Productivity in Zanzibar (cont’d) Sampling • 1,260 households across two districts in Zanzibar: – 864 households in North B district in Unguja – 396 households in Chake Chake district in Pemba • Each Block Extension Officer (BEO) responsible for 36 households in 1-2 Shahias – 24 BEOs in North B and 11 in Chake Chake Zanzibar: Experiment on Cassava Productivity Measurement Summary of the Methodology Land Area Cassava Production Compass and rope GPS measurement Crop-cutting with balance scales  for one randomly selected cassava field for all households Farmer self-reported area 315 D1 households: crop diaries with BEO visits twice a week (to be conducted for all cassava fields owned and/or cultivated by all households) 315 D2 households: crop diaries with telephone calls twice a week 315 R1 households: farmer self-reported harvest (6-month recall) 315 R2 households: farmer self-reported harvest (12-month recall) Measuring Cassava Collaboration with Global Strategy ZANZIBAR • In Zanzibar, the experiment is conducted by LSMS Team and fieldwork started in May 2013 and is expected to be completed in April 2014. MALAWI • Preliminary lessons will be learned from Zanzibar experiment for designing a second experiment in Malawi. • WB (LSMS) and FAO (Global Strategy) will work together to prepare and conduct the validation exercise in Malawi with funding from the research component of the Global Strategy. • Preparation will start in the Fall but field work will depend on the season probably start early 2014 • LSMS Team has started identification of potential teams to do the fieldwork and put together a budget and define administrative and financial arrangements. THANK YOU [email protected]